/**
* tries to secure session from hijacking and fixation
* should be called before login and after successful login
* (only required if sensitive information stored in session)
*
* @return void
*/
function PMA_secureSession()
{
// prevent session fixation and XSS
if (session_status() === PHP_SESSION_ACTIVE) {
session_regenerate_id(true);
}
PMA_generateToken();
}
$session_result = session_start();
if ($session_result !== true || $orig_error_count != $GLOBALS['error_handler']->countErrors(false)) {
setcookie($session_name, '', 1);
$errors = $GLOBALS['error_handler']->sliceErrors($orig_error_count);
PMA_sessionFailed($errors);
}
unset($orig_error_count, $session_result);
/**
* Disable setting of session cookies for further session_start() calls.
*/
@ini_set('session.use_cookies', 'true');
/**
* Token which is used for authenticating access queries.
* (we use "space PMA_token space" to prevent overwriting)
*/
if (!isset($_SESSION[' PMA_token '])) {
PMA_generateToken();
/**
* Check for disk space on session storage by trying to write it.
*
* This seems to be most reliable approach to test if sessions are working,
* otherwise the check would fail with custom session backends.
*/
$orig_error_count = $GLOBALS['error_handler']->countErrors();
session_write_close();
if ($GLOBALS['error_handler']->countErrors() > $orig_error_count) {
$errors = $GLOBALS['error_handler']->sliceErrors($orig_error_count);
PMA_sessionFailed($errors);
}
session_start();
}